Zhi-Feng Xiu¹, *Yu-Zhang Ma¹, Qing-He Zhang¹, Zan-Yang Xing¹, Shun-Rong Zhang², Yong-Liang Zhang³, Kjellmar Oksavik⁴, Larry Lyons⁵, Michael Lockwood⁶, Yong Wang¹ (1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China, 2.MIT Haystack Observatory, Westford, MA, USA, 3.The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA, 4.Department of Physics and Technology, University of Bergen, Bergen, Norway, 5.Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA, 6.Department of Meteorology, University of Reading, Reading, UK)